Steam-superheater.



Patented Oct. I, l90l. A. HERING.

STEAM SUPERHEATER.

(Agplication filed. Jan. 80, 1901 ZSheets-Sheet I.

(No Model.)

No.'683,757.- Patented Oct. I, 190i. A. HERING.

STEAM SUPERHEATER;

(Application filed Jan. 80, 1901.) (No Model.) 2 Shaets Sheet 2.

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UNITED STATES PATENT OFFICE.

AUGUST HERING, OF NUREMBERG, GERMAN-Y.

STEAM-SUPERHEATER.

SPECIFICATION forming part of Letters Patent No. 683,757, dated October1, 1901.

Application filed January 30, 1901. SeriaI No. 45,309. (No model.

To all 2077,0717 it 'ntay concern.-

Be it known that I, AUGUST HERING, of Nuremberg, Empire of Germany, haveinvented a new and useful Improvement in Steam-Superheaters, (patentedin Great Britain, No. 17,900, August 19, 1898,) of which the followingis a specification.

This invention has reference to steam-superheaters, and relates moreparticularly to the type of super-heater comprising a series of pipesthrough which the steam to be superheated is passed, which pipes areadapted to be heated in any suitable manner, usually and conveniently bybeing exposed either directly or indirectly to the products ofcombustion and gases flowing from the furnace.

The invention consists in means for mixing with saturated steamintroduced at one point in the pipes superheated steam from anotherportion of the pipes.

The invention consists also in the details of construction andcombination of parts hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a longitudinal sectionalelevation of a furnace and superheater embodying my invention. Fig. 2 isa horizontal sectional plan View of the same. Fig. 3 is an elevation ofthe same.

Referring to the drawings, my superheater comprises a series ofsuperheater-pipes 1, arranged in a superheater-chamber 2, through whichthe gases and products of combustion froma furnace 3 flow to the flueleading to the smoke-stack. These pipes are preferably coiled or bent onthemselves, back and forth, to give an extended flow of the steam, andthey have their ends projected outward through the wall 4 of thesuperheater-chamber,where they are connected to and communicate with twovertical collectors 5 and 6, in the form of cylindrical chambers,sustained at the outside of the superheaterchamber, the collector 5receiving the saturated steam to be superheated through a supply-pipe 7,and the superheated steam, after passing through the pipes, leavingcollector 6 through its discharge end 8. In superheaters arranged inthis manner, where the pipes are exposed directly to the hot products ofcombustion and gases, unless means are provided to prevent the pipes areinjuriously affected and in many cases rapidly destroyed by the intenseheat to which they are subjected. In order to avoid this objectionableaction, I propose to introduce the steam to be superheated, which isusually saturated steam, simultaneously at different points in thepipes, so as to counteract the effect of the furnace heat and to obviatethe liability of there being any portion of the pipes receiving onlysuperheated steam passing th rough other portions. This is effected bydividing collector 5 by means of a partition 8 into an upper compartment9 and a lower compartment 10, into which compartments the saturatedsteam is introduced simultaneously by branch pipes 11 and 12, leadingfrom the supply-pipe '7 and communicating, respectively, with saidcompartments. Collector 6 is also divided by a partition 13 into anupper compartment 14 and lower compartment 15, which latter is connectedwith the upper compartment 9 of collector 5 by an obliqueconnecting-pipe 16. As a result of this construction and arrangement thesaturated steam supplied by pipe 7 will flow simultaneously to bothcompartments of collector 5, that introduced in the lower compartment 10passing through the lower group of superheaterpipes to the lowercompartment 15 of collector 6, and becoming superheated it flows throughthe connecting-pipe 16 to the upper compartment 9 of collector 5,joining there the saturated steam introduced directly into it by pipe11. The mingled superheated and saturated steam passes through the uppergroup of tubes to the upper compartment 14 of collector 6, whence itfinds an exit through the discharge end of the collector. It is seentherefore that by this peculiar manner of introd ucing the steam therewill be no portion of the pipes receiving superheated steam alone,

the lower group of pipes receiving saturated.

steam only while the upper group receives a mixture of superheated andsaturated steam. This will effectively prevent the burning of the pipesand greatly lengthen the life of the same.

Having thus described my invention, what I claim is 1. In asteam-superhcater the combination with a series of superheating-pipes,of a collector connected with one end of said pipes, a partitiondividing the collector into separate compartments, and means forintroducing the steam to be superheated simu1tane-.

ously into said compartments.

2. In a steam-superheater the combination with a series of pipes, ofmeans for introducing saturated steam therein 'and means for mixing thesuperheated steam from a portion of the pipes with saturated steamintroduced at a different point.

3. In a steam-superheater the combination with two groups of superheaterpipes, of means forintroducing steam to be superheated to both of saidgroups, and means for introducing the superheated steam from one groupinto the other; whereby the superheated steam from one group will bemingled with

